The Mobile RehApp Project investigates the use of Mobile Augmented Reality (MAR) for therapeutic support that aims to assist physiotherapists and patients on ankle sprain rehabilitation. People struggle to recover from injuries due to the lack of commitment to their rehabilitation exercises as they are often boring. Recent approaches that involve the use of interactive video games have shown positive results in exercising as users engage in physical activity while playing a game. Yet, there are not tools in the market that offer portable rehabilitation exercises in the form of interactive games.